JSON to YAML
JSON to YAML by default, switchable both ways.
JSON to YAML is a browser-based web developer tool on WebDevToolsBase. JSON to YAML by default, switchable both ways. To use it, paste your input and view the result directly in your browser — no signup and nothing to install.
JSON to YAML is a free JSON Tools utility that runs entirely in your browser — nothing you enter is uploaded.
Converts one document using JSON-compatible values and string mapping keys. Numbers that would change during conversion, negative zero, nonfinite values, timestamps, binary data, sets, ordered maps, pairs, merge keys, cycles and unknown tags are rejected. Quote values only when text is intended; this changes their type. Ordinary aliases are expanded for JSON. Comments, quote style and numeric spelling are not retained. Limits: 2 MiB of text, 50,000 expanded values and 100 nesting levels.
How to use JSON to YAML
- Select the conversion direction, then paste one document in that source format.
- Read the completed output. Unsupported values produce an error instead of a changed result.
- For dates or large numeric identifiers, use quoted strings only when the receiving application expects text.
- Copy the current completed output. Changing to invalid input clears the previous result.
About this tool
This browser tool works with the supported JSON-compatible subset of YAML described above. A completed result means that this conversion succeeded; it does not validate an application schema, a deployment configuration or another programming language’s parser.
Keep the original source before formatting or conversion. Formatting normalizes presentation and removes comments. The operation runs locally in this browser and does not upload the entered document to a conversion service.
Frequently asked questions
How do I use JSON to YAML?
JSON to YAML lets you process your input right in the browser using the Direction control, with the result shown instantly and nothing uploaded.
Does JSON to YAML cost anything?
This local tool is free to use. Its supported data types and conversion-size limits are listed beside the result.
Does JSON to YAML upload my data?
No — JSON to YAML processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can JSON to YAML handle large or deeply nested JSON?
Conversion accepts at most 2 MiB of text, 50,000 expanded values and 100 nesting levels. Split larger documents. Values with unsupported types or numeric precision produce an error instead of a changed result.
Can I use JSON to YAML without a connection?
Yes — after the first load JSON to YAML runs entirely offline.